The performance of any high-temperature alloy depends on its precise elemental balance. GH3030 (Nickel Alloy 75) is a single-phase austenitic nickel-chromium alloy. Its chemical composition is specially designed to form a "self-healing" oxide layer, ensuring optimal stability in environments up to 800°C.
As a leading manufacturer of GH3030, Gnee Steel employs advanced smelting technology to ensure that every batch meets or exceeds the stringent requirements of international engineering fields.
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What are the chemical components of GH3030?
What are the chemical components of GH3030?
GH3030 is a nickel-based solid solution strengthened superalloy (approximately 80Ni-20Cr), with nickel (Ni) as the main component, the balance being approximately 53-75%, chromium (Cr) content of 19-22%, and small amounts of iron (Fe), titanium (Ti), and aluminum (Al). It possesses excellent oxidation resistance and high plasticity, and is commonly used for components operating at temperatures below 800-1100°C.
What are the components of NIMONIC 75?
Nimonic 75 (UNS N06075) is an 80/20 nickel-chromium alloy. Its main component is nickel, with a chromium content of 18.0%–21.0%, and small amounts of titanium and carbon. It possesses excellent oxidation resistance and high-temperature strength, and is commonly used in gas turbines and furnace components. It also contains small amounts of iron, silicon, and manganese.
1. GH3030 Chemical Composition Table (Standard: GB/T 14992)
Our GH3030 material is purified to minimize trace impurities (P, S, Pb, Bi), which is crucial for preventing hot cracking during welding and ensuring long-term structural stability.
| Element | Symbol | Percentage (%) | Role in Alloy |
| Nickel | Ni | Balance | Provides high-temperature stability and corrosion resistance. |
| Chromium | Cr | 19.0 - 22.0 | Forms a dense Cr2O3 protective layer for oxidation resistance. |
| Titanium | Ti | 0.15 - 0.35 | Acts as a stabilizer and provides solid-solution strengthening. |
| Iron | Fe | ≤ 1.50 | Controlled to maintain nickel-base purity. |
| Carbon | C | ≤ 0.12 | Influences grain size and strength. |
| Aluminum | Al | ≤ 0.15 | Assists in deoxidation and surface integrity. |
| Manganese | Mn | ≤ 0.70 | Improves hot workability. |
| Silicon | Si | ≤ 0.80 | Enhances oxidation resistance at high temperatures. |
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2.Advantages of Choosing Gnee Steel GH3030 Alloy
Not all GH3030 steel is the same. We differentiate our materials in the following ways:
High-Purity Melting: We use a dual process of vacuum induction melting (VIM) and electroslag remelting (ESR). This dual process eliminates inclusions and significantly reduces impurity content, thereby improving fatigue life.
Fully Compliant with Standards: Our GH3030 steel fully complies with ASTM, DIN, and GB international standards (equivalent to Nimonic 75).
100% Traceability: Every order comes with a complete 3.1 Factory Test Certificate (MTC) detailing the precise thermal analysis results of the materials you require.
3.GH3030 Product Supply and Customization Services
We offer GH3030 in various semi-finished forms, which can be tailored to your specific project needs:
Forged Bars: High-strength structural components.
Cold-Rolled Sheets: Precision thickness plates for combustion chamber linings.
Seamless Steel Tubes: High-pressure heat exchange systems.
Custom Forgings: Rings, discs, and flanges manufactured according to your drawings.
Contact us now to get the latest export price for GH3030 in 2026
FAQ
Q1: What is the equivalent of GH3030 in the US and Europe?
A: GH3030 is the Chinese designation. It is chemically similar and serves as an equivalent to Nimonic 75 (UK) and UNS N06075 (USA), typically covered under ASTM B166/B168.
Q2: Why is the Titanium content so specific (0.15 - 0.35%)?
A: Titanium helps in stabilizing the alloy and provides a degree of solid-solution strengthening without making the material overly brittle, which is why GH3030 maintains such high plasticity.
Q3: Can you provide GH3030 with even lower Carbon for special applications?
A: Yes. As a direct manufacturer, we can perform custom melts to meet tighter chemical tolerances for specific aerospace or nuclear requirements.
Q4: Do you offer wholesale pricing for bulk orders?
A: Absolutely. We provide tiered Wholesale Pricing and long-term supply contracts with Global Logistics Support.
